157 lines
2.9 KiB
C
157 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2022 ARM Limited.
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* Original author: Mark Brown <broonie@kernel.org>
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*/
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/sched.h>
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#include <linux/wait.h>
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#define EXPECTED_TESTS 1
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static void putstr(const char *str)
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{
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write(1, str, strlen(str));
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}
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static void putnum(unsigned int num)
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{
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char c;
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if (num / 10)
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putnum(num / 10);
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c = '0' + (num % 10);
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write(1, &c, 1);
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}
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static int tests_run;
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static int tests_passed;
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static int tests_failed;
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static int tests_skipped;
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static void print_summary(void)
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{
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if (tests_passed + tests_failed + tests_skipped != EXPECTED_TESTS)
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putstr("# UNEXPECTED TEST COUNT: ");
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putstr("# Totals: pass:");
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putnum(tests_passed);
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putstr(" fail:");
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putnum(tests_failed);
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putstr(" xfail:0 xpass:0 skip:");
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putnum(tests_skipped);
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putstr(" error:0\n");
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}
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int fork_test(void);
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int verify_fork(void);
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/*
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* If we fork the value in the parent should be unchanged and the
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* child should start with the same value. This is called from the
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* fork_test() asm function.
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*/
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int fork_test_c(void)
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{
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pid_t newpid, waiting;
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int child_status, parent_result;
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newpid = fork();
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if (newpid == 0) {
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/* In child */
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if (!verify_fork()) {
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putstr("# ZA state invalid in child\n");
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exit(0);
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} else {
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exit(1);
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}
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}
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if (newpid < 0) {
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putstr("# fork() failed: -");
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putnum(-newpid);
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putstr("\n");
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return 0;
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}
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parent_result = verify_fork();
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if (!parent_result)
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putstr("# ZA state invalid in parent\n");
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for (;;) {
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waiting = waitpid(newpid, &child_status, 0);
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if (waiting < 0) {
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if (errno == EINTR)
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continue;
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putstr("# waitpid() failed: ");
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putnum(errno);
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putstr("\n");
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return 0;
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}
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if (waiting != newpid) {
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putstr("# waitpid() returned wrong PID\n");
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return 0;
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}
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if (!WIFEXITED(child_status)) {
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putstr("# child did not exit\n");
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return 0;
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}
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return WEXITSTATUS(child_status) && parent_result;
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}
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}
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#define run_test(name) \
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if (name()) { \
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tests_passed++; \
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} else { \
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tests_failed++; \
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putstr("not "); \
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} \
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putstr("ok "); \
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putnum(++tests_run); \
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putstr(" " #name "\n");
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int main(int argc, char **argv)
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{
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int ret, i;
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putstr("TAP version 13\n");
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putstr("1..");
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putnum(EXPECTED_TESTS);
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putstr("\n");
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putstr("# PID: ");
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putnum(getpid());
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putstr("\n");
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/*
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* This test is run with nolibc which doesn't support hwcap and
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* it's probably disproportionate to implement so instead check
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* for the default vector length configuration in /proc.
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*/
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ret = open("/proc/sys/abi/sme_default_vector_length", O_RDONLY, 0);
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if (ret >= 0) {
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run_test(fork_test);
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} else {
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putstr("# SME support not present\n");
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for (i = 0; i < EXPECTED_TESTS; i++) {
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putstr("ok ");
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putnum(i);
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putstr(" skipped\n");
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}
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tests_skipped += EXPECTED_TESTS;
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}
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print_summary();
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return 0;
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}
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